SH - StandardHeight base only - map is 11 cm (4,3") above the bar axis. Bestselling base suitable for bikers from 155 to 185 cm height. Compatible with any AutoPilot board. Bases available for either for 31,8 mm bars diameter (95%) or 35 mm (5%). Bases colors - black, red, white. Other colors possible. Please specify in the comment desired diameter and color.